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1.4.0 (Unstable)Neon Core[PGP][MD5][SHA512]Neon GTD[PGP][MD5][SHA512]File Logo_Java36xjavascript docs
1.3.1Neon Core[PGP][MD5][SHA512]Neon GTD[PGP][MD5][SHA512]File Logo_Java36xjavascript docs
1.2.0Neon Core[PGP][MD5][SHA512]Neon GTD[PGP][MD5][SHA512]File Logo_Java36xjavascript docs
1.1.5Neon Core[PGP][MD5][SHA512]Neon GTD[PGP][MD5][SHA512]File Logo_Java36xjavascript docs
1.1.0Neon Core[PGP][MD5][SHA512]Neon GTD[PGP][MD5][SHA512]File Logo_Java36xjavascript docs
1.0Neon Core[PGP][MD5][SHA512]Neon GTD[PGP][MD5][SHA512]File Logo_Java36xjavascript docs

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Neon provides a JavaScript API, which is the simplest way to connect your software to the Neon server.

Alternatively, Neon provides web (REST) endpoints, so you can execute queries with any languages capable of making HTTP GET and POST requests.

Build Dependencies

You need to download and install the following dependencies to build and/or run Neon.

Java JDK

Neon is a Java application and therefore requires Java JDK. Java version 7 or 8 is required.


The Neon source code is hosted on GitHub. In order to download the code from the Neon repository, download Git and following the instruction for cloning an existing repository.


Node.js and npm are used to build the Neon JavaScript code.


While Neon uses Gradle 1.x as its build system, you do not need to download and install it yourself. We recommend that you use the Gradle wrapper, ./gradlew when building and working with Neon to avoid version conflicts. Instructions for building Neon using the Gradle wrapper are found in the Building Neon section.

Run-time Dependencies

Mongo Database

Neon supports Mongo and Spark SQL database systems. We recommend first time users download Mongo and configure Neon to use this database.

Spark SQL Database (optional)

Neon also supports Spark database systems. Installation instructions for the Spark SQL database are found here.


An experimental Elasticsearch (ES) connector is included in version 1.1.5. 1.1.5 will provide a basic capability to execute Neon queries against an Elasticsearch cluster with a few limitations and requirements on the ElasticSearch node. The initial capability is compatible with ES 1.7.x. ES 2.X support will follow in later builds. Installation instructions for ES are found here.

Requirements for the Neon ES connector:

Neon uses a Transport Client to query ES. Transport Clients typically run against ports in the 9300-9400 range with 9300 being the default. The ES node to which Neon communicates must allow UDP and TCP traffic on that port for the connection to work properly.

Neon queries against date fields in ES will use the following date format: E MMM d HH:mm:ss zzz yyyy. For Neon date queries and aggregations to work properly with an ES index, any date fields in that index should allow the ‘E MMM d HH:mm:ss zzz yyyy’ format in addition to any others.


For production environments, we recommend running Neon inside a Tomcat web server. Tomcat is not required to build Neon, and for development purposes a Jetty server can be run from the command line using ./gradlew jettyRun. Instructions for running Neon inside of Tomcat are found on the Deploying Neon page.

  • Download Tomcat (version 7.0 or later)

Supported Browsers

Neon has been tested in Firefox and Chrome browsers.

JavaScript Libraries

Neon provides two versions of its JavaScript library; one version includes the needed JavaScript dependencies while the second does not include JavaScript dependencies.

To use the neon-nodeps.js no dependencies file, you will need to also include an appropriate version of each JavaScript library in your HTML. Using the neon-nodeps.js file requires the following additional libraries: